odoo/addons/l10n_be_payroll/hr_payroll_rule_view.xml

<?xml version="1.0" encoding="utf-8"?>
<openerp>
    <data>
        <record id="hr_contract_form_inherit" model="ir.ui.view">
            <field name="name">hr.contract.form.inherit</field>
            <field name="model">hr.contract</field>
            <field name="type">form</field>
            <field name="inherit_id" ref="hr_contract.hr_contract_view_form"/>
            <field name="arch" type="xml">
            <data>
		 <xpath expr="/form/notebook/page/group/field[@name='working_hours']" position="after">
		    <field name="horaire_effectif"/>
		 </xpath>
                 <xpath expr="/form/notebook/page/group/field[@name='advantages']" position="before">
		    <field name="reim_travel"/>
                    <field name="company_car"/>
		    <field name="mis_ex_onss"/>
		    <field name="ch_value"/>
		    <field name="ch_worker"/>
	  	    <field name="insurance"/>
		    <field name="advantage"/>
		    <group colspan="2" col="2">
			<separator string="Miscellaneous" colspan="2"/>
			  <field name="suppl_net"/>
			  <field name="retained_net"/>
			  <field name="vol_tax"/>
		    </group>	
                </xpath>
            </data>
            </field>
        </record>

        <record id="hr_contract.hr_hr_employee_view_for" model="ir.ui.view">
            <field name="name">hr.hr.employee.view.for</field>
            <field name="model">hr.employee</field>
            <field name="inherit_id" ref="hr.view_employee_form"/>
            <field name="arch" type="xml">
            <data>
                <xpath expr="/form/notebook/page/group/field[@name='marital']" position="after">
			<field name="statut_fiscal" help="Only if Married"/> 
			<field name="handicap" help="Only if Married"/>
		</xpath>
		<xpath expr="/form/notebook/page/group/field[@name='children']" position="after">
			<field name="handicap_child"/>
			<field name="number_handicap" attrs="{'invisible':[('handicap_child','!=',True)]}" colspan="1"/>
		</xpath>
	    </data>
            </field>
        </record>
    </data>
</openerp>